The traditional post-Labor Day rush in US investment-grade corporate bonds, normally one of the busiest windows on Wall Street’s calendar, just turned in its weakest showing since 2020.
A sudden chill after a scorching summer
August 2026 saw investment-grade issuance surge to roughly $130 to $145 billion, blowing past the post-2019 average of approximately $95 billion for the month. Year-to-date issuance through August had already exceeded $1.68 trillion, a roughly 27% jump compared to the same period last year. Full-year forecasts had been pointing toward $2 trillion or more in total IG issuance for 2026.
The 10-year Treasury yield has been flirting with multi-year highs, injecting enough uncertainty into borrowing costs that CFOs decided to wait rather than pull the trigger. Credit spreads have hovered in the 70 to 80 basis point range even as supply surged. Average yields near 5% have kept fixed-income buyers engaged.
What fueled the 2026 bond binge
